circle.precision([angle]) If precision is specified, sets the circle precision to the specified angle in degrees

projection.translate([translate]) If translate is specified, sets the projection’s translation offset to the

d3.geoGraticule10() A convenience method for directly generating the default 10° global graticule as a GeoJSON MultiLineString geometry

d3.geoMercator() d3.geoMercatorRaw

projection.center([center]) If center is specified, sets the projection’s center to the specified center

projection.scale([scale]) If scale is specified, sets the projection’s scale factor to the specified value

graticule.outline() Returns a GeoJSON Polygon geometry object representing the outline of this graticule, i.e. along the meridians

path.context([context]) If context is specified, sets the current render context and returns the path generator

projection.clipExtent([extent]) If extent is specified, sets the projection’s viewport clip extent to the specified

d3.geoTransform(methods) Defines an arbitrary transform using the methods defined on the specified methods object.